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经营范围
发明名称
Boring ram.
摘要
申请公布号
EP0441172(B1)
申请公布日期
1993.12.22
申请号
EP19910100788
申请日期
1991.01.23
申请人
ROEMER, HELMUTH
发明人
ROEMER, HELMUTH
分类号
E21B4/14;(IPC1-7):E21B4/14
主分类号
E21B4/14
代理机构
代理人
主权项
地址
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